|Quantitative relationship between stimulus and effect in the static organ - Mulder, W|
Animal studies of stimulus effects on otolith organs and semicircular canals, and reflex time of rotation nystagmus in man
Keywords: DEHYDRATION; WATER CONSUMPTION; DIURESIS; DRINKING; WATER BALANCE; WATER LOSS; HIGH TEMPERATURE AIR; PERSPIRATION; PHYSICAL WORK; URINATION
|Opportunities for NASA Aerospace Related Funding and Collaboration - Miranda, Felix A|
This presentation describes the different opportunities that NASA offers for effective collaboration with Academia and Industry. In particular, the presentation includes a general overview of opportunities such as SBIRs, STTRs, Educational Programs and NASA Research Announcements. A general description of forthcoming competitive opportunities under the Exploration Systems Mission Directorate (ESMD) as well as the Science Mission Directorate (SMD) are also provided.
Keywords: BORON NITRIDES; NANOTUBES; NANOFABRICATION; HIGH TEMPERATURE TESTS; HIGH TEMPERATURE AIR; THERMAL RESISTANCE
|AERODYNAMICS AND FLIGHT DYNAMICS OF TURBOJET AIRCRAFT - LIGUM, T. I|
AERODYNAMICS AND FLIGHT DYNAMICS OF TURBOJET AIRCRAFT
Keywords: ELECTRIC ARCS; ELECTRICAL RESISTIVITY; HIGH TEMPERATURE AIR; THERMAL CONDUCTIVITY; THERMAL PLASMAS; ELECTRICAL MEASUREMENT; NITROGEN; TEMPERATURE MEASUREMENT
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|Cross-power spectral analysis for atmospheric cross-beam data - Locklin, J. M.|
Cross-power spectral analysis for atmospheric cross beam data
Keywords: CHROMIUM ALLOYS; COATINGS; OXIDATION RESISTANCE; HIGH TEMPERATURE AIR; MOLYBDENUM ALLOYS; SILICON ALLOYS; TANTALUM ALLOYS; TITANIUM ALLOYS; YTTRIUM ALLOYS
|Polymorphism of copper sulfides in the system Cu sub 2 S-Cu sub 1.8 S - Koshurnikov, B. L.|
Polymorphism of copper sulfides in chalcosine and digenite systems
Keywords: CARBONATES; X RAY DIFFRACTION; EXOTHERMIC REACTIONS; MAGNESIUM COMPOUNDS; THERMAL ANALYSIS; CARBON DIOXIDE; CHEMICAL ANALYSIS; HIGH TEMPERATURE AIR; PYROLYSIS; THERMOGRAVIMETRY
|Low-Thermal-Conductivity Pyrochlore Oxide Materials Developed for Advanced Thermal Barrier Coatings - Bansal, Narottam P.|
When turbine engines operate at higher temperatures, they consume less fuel, have higher efficiencies, and have lower emissions. The upper-use temperatures of the base materials (superalloys, silicon-based ceramics, etc.) used for the hot-section components of turbine engines are limited by the physical, mechanical, and corrosion characteristics of these materials. Thermal barrier coatings (TBCs) are applied as thin layers on the surfaces of these materials to further increase the operating temp...
Keywords: SOLID LUBRICANTS; GAS BEARINGS; COATING; TECHNOLOGY ASSESSMENT; SUBSTRATES; ALLOYS; HIGH TEMPERATURE LUBRICANTS; HIGH TEMPERATURE AIR; FOIL BEARINGS; FRICTION
|BULK-FLOW ANALYSIS OF HYBRID THRUST BEARINGS FOR ADVANCED CRYOGENIC TURBOPUMPS - SANANDRES, LUI|
A BULK-FLOW ANALYSIS AND COMPUTER PROGRAM FOR PREDICTION OF THE STATIC LOAD PERFORMANCE AND DYNAMIC FORCE COEFFICIENTS OF ANGLED INJECTION, ORIFICE-COMPENSATED HYDROSTATIC/HYDRODYNAMIC THRUST BEARINGS HAVE BEEN COMPLETED. THE PRODUCT OF THE RESEARCH IS AN EFFICIENT COMPUTATIONAL TOOL FOR THE DESIGN OF HIGH-SPEED THRUST BEARINGS FOR CRYOGENIC FLUID TURBOPUMPS. THE STUDY ADDRESSES THE NEEDS OF A GROWING TECHNOLOGY THAT REQUIRES OF RELIABLE FLUID FILM BEARINGS TO PROVIDE THE MAXIMUM OPERATING LIFE ...
Keywords: THERMODYNAMIC PROPERTIES; PRANDTL NUMBER; THERMAL CONDUCTIVITY; TRANSPORT PROPERTIES; HIGH TEMPERATURE AIR; ENTHALPY; ENTROPY; SPECIFIC HEAT; ACOUSTIC VELOCITY; VISCOSITY; COMPRESSIBILITY
|Self-Lubricating Composite Containing Chromium Oxide - NON|
A self lubricating. friction and wear reducing composite material useful over a wide temperature range of from cryogenic temperature up to about 900 C. contains 60 80 wt. of particulate Cr2O3, dispersed in a metal binder of a metal alloy containing Cr and at least 50 wt. of Ni, Cr or a mature of Ni and Cr. It also contains 5-20 wt. of a fluoride of at least one Group I, Group II or rare earth metal and...
Keywords: THERMOGRAPHY; BLOWERS; EXPERIMENTATION; FAILURE; FINITE ELEMENT METHOD; HEAT SOURCES; HIGH TEMPERATURE AIR; IMPACT DAMAGE; INTERRUPTION; LASERS; NONDESTRUCTIVE TESTS; DEFECTS; DEPTH; HEAT TRANSMISSION; INSPECTION; PENETRATION; TEMPERATURE EFFECTS; THERMAL MAPPING
|Design of Aspirated Compressor Blades Using Three-Dimensional Inverse Method - Dang, T. Q.|
A three-dimensional viscous inverse method is extended to allow blading design with full interaction between the prescribed pressure-loading distribution and a specified transpiration scheme. Transpiration on blade surfaces and endwalls is implemented as inflow/outflow boundary conditions, and the basic modifications to the method are outlined. This paper focuses on a discussion concerning an application of the method to the design and analysis of a supersonic rotor with aspiration...
Keywords: COATINGS; CROSSLINKING; SUBSTRATES; SURFACE TEMPERATURE; TEMPERATURE PROFILES; HEAT TRANSFER; HIGH TEMPERATURE AIR; POLYMER MATRIX COMPOSITES; POLYIMIDES; OPTIMIZATION; HEATING; MATHEMATICAL MODELS; HVOF THERMAL SPRAYING; DEPOSITION; TURBINE ENGINES
|GPS-Based Navigation and Orbit Determination for the AMSAT Phase 3D Satellite - Davis, George|
This paper summarizes the results of processing GPS data from the AMSAT Phase 3D (AP3) satellite for real-time navigation and post-processed orbit determination experiments. AP3 was launched into a geostationary transfer orbit (GTO) on November 16, 2000 from Kourou, French Guiana, and then was maneuvered into its HEO over the next several months. It carries two Trimble TANS Vector GPS receivers for signal reception at apogee and at perigee...
Keywords: GROUND EFFECT (AERODYNAMICS); HIGH TEMPERATURE AIR; BOUNDARY CONDITIONS; ALGORITHMS; TIME DEPENDENCE; V/STOL AIRCRAFT; HARRIER AIRCRAFT; NAVIER-STOKES EQUATION; LOW FREQUENCIES; VORTICES; HIGH TEMPERATURE GASES; FUSELAGES
|Nonlinear interaction between a pair of oblique modes in a supersonic mixing layer: Long-wave limit - Balsa, Thomas F.|
The nonlinear interaction between a pair of symmetric, oblique, and spatial instability modes is studied in the long-wave limit using asymptotic methods. The base flow is taken to be a supersonic mixing layer whose Mach number is such that the corresponding vortex sheet is marginally stable according to Miles' criterion. It is shown that the amplitude of the mode obeys a nonlinear integro-differential equation...
Keywords: BRIDGMAN METHOD; SINGLE CRYSTALS; TOUGHNESS; DIRECTIONAL SOLIDIFICATION (CRYSTALS); FRACTOGRAPHY; HIGH TEMPERATURE AIR; MICROSTRUCTURE; PURITY; ROOM TEMPERATURE; CREEP STRENGTH; EUTECTIC ALLOYS; EUTECTIC COMPOSITES; FRACTURE MECHANICS; FRACTURE STRENGTH; FRACTURING; HIGH TEMPERATURE; INTERMETALLICS
|Inter-Cusp Ion and Electron Transport in a NSTAR-Derivative Ion Thruster - Foster, John E|
Diffusion of electrons and ions to anode surfaces between the magnetic cusps of a NASA Solar Electric Propulsion Technology Application Readiness ion thruster has been characterized. Ion flux measurements were made at the anode and at the screen grid electrode. The measurements indicated that the average ion current density at the anode and at the screen grid were approximately equal. Additionally, it was found that the electron flux to the anode between cusps is best described by the classical ...
Keywords: DESIGN ANALYSIS; HEATING EQUIPMENT; HEAT SINKS; HEAT EXCHANGERS; FUEL INJECTION; COMPRESSORS; AIR CONDITIONING EQUIPMENT; FABRICATION; PERFORMANCE TESTS; JET ENGINES; COOLING SYSTEMS; EXHAUST NOZZLES; JET ENGINE FUELS; INDUSTRIES; HIGH TEMPERATURE AIR